The ibasal is much more than just a basal thermometer – it’s an FDA-cleared fertility monitor that is able to calculate your precise ovulation date and peak fertile days based on your daily temperatures and a variety of other fertility indicators. The ibasal works for women with irregular cycles as well as regular ones, and it continues to learn your body’s unique patterns month after month in order to provide exceptionally accurate results.

How Can Basal Body Temperature Be Used to Identify Ovulation?

Basal body temperature (BBT) charting is a tried and true method for determining precisely when during your menstrual cycle you ovulate. Your basal body temperature is the temperature at which your body rests, which tends to be a bit lower than your "normal" temperature, usually 97 point something degrees F versus 98.6 degrees F. By measuring your BBT each morning (after a full night's sleep) throughout your cycle you can detect the natural and subtle rise in your basal body temperature that occurs just after ovulation. This post-ovulatory shift in BBT is caused by increased production of the hormone progesterone, sometimes referred to as the "warming hormone".

How Does the ibasal Work?

With the ibasal, BBT charting just got smarter and easier. The ibasal is a computerized digital basal thermometer and fertility monitor that helps you maximize your chances of conceiving by accurately measuring your BBT and interpreting this data to produce a fertility prediction in advance of ovulation.

The ibasal is easy to use. To begin, simply set the time and date in the ibasal and set the alarm. The alarm will sound the next morning and each morning throughout your cycle, reminding you to take your BBT and ensuring reading consistency from one day to the next. The ibasal will measure and display your temperature to the 1/100 th of a degree (e.g. 97.41 F), show your cycle day, and populate a graph of your previous 10 readings on the LCD screen. This graph of readings allows you to easily see the shift in temperature that follows ovulation.

After collecting and storing your BBT readings, the ibasal will interpret this information to produce your own customized fertility prediction, allowing you to time intercourse in advance of ovulation for the best chance of conceiving in each cycle.

How is the ibasal Different than Other Basal Thermometers?

A regular off-the-shelf basal thermometer simply reports your temperature and nothing more. The user must then interpret the data and resultant chart in order to determine when ovulation occurred. In contrast, in addition to providing a highly accurate basal temperature reading, the ibasal actually interprets your data for you to tell you when you will ovulate and when you’re most fertile. Other data points considered by the ibasal algorithm include bleeding, cramping, cervical mucus consistency, and intercourse dates. The ibasal can even tell you when your results indicate a possible pregnancy!

iBasal Digital Thermometer

I would recommend this item to a friend.

Its accurate. I didn't get pregnant but I'm also 41 years old and my age might have something to do with me not being able to get pregnant.

Cons:

I didn't get pregnant.

Courtney

Maryland

4 Stars

I would recommend this item to a friend.

Does everything you could ask

June 2, 2014

This is very easy to use and it has been very informative in combination with ova graph.
Really thankful for this product and the chance to understand my body and cycles in a more in depth way.
I feel more in control of my fertility.

Pros:

Easy fool proof with alarm.

Cons:

Takes a long time to take temperature.

SMB

Connecticut

4 Stars

I would recommend this item to a friend.

Good, but needs improvement

May 26, 2014

This is a great digital thermometer, the best I have found on the market. Pros: I love that it is accurate to 1/100th of a degree and that it can store 10 days worth of data.The alarm is also a huge plus. Cons: buttons are two sensitive, sometimes a single push can depress the button twice. The most important con for me is that the instructions are not accurate. I have yet to figure out how to input the start of my second cycle because the instructions are not working. Finally, the first time I took my temperature it took 8 minutes to register the first temperature (the first beep) and an additional several minutes to register the last few temperatures (the final set of beeps). I now leave the thermometer in until the last set of beeps because the first time I took at out after the first beep, it continued to beep incessantly for 10 minutes. I now just input all the temperatures into an app on my cell phone and don't use all the fancy features of the thermometer since I can't figure them out. Seems like a waste of money, but the alarm and the accuracy of the temperatures makes it worth it for me.

Pros:

Accuracy
Alarm
Ability to save 10 days worth of data

Cons:

Buttons too sensitive
Instructions are not accurate

Becca

Texas

5 Stars

I would recommend this item to a friend.

Pregnant within Three Cycles!

March 10, 2014

My husband and I were casually trying for six months before I decided to take charge and start charting my basal temperatures. This thermometer helped me pinpoint my exact dates of ovulation, which was not an easy task prior to this. I got pregnant on my third cycle and couldn't be happier.

Pros:

stores temperatures, alarm clock, pregnancy prediction

Cons:

hard to use at first

Robyn

Lafayette, Indiana

5 Stars

I would recommend this item to a friend.

Amazing!

January 14, 2014

I was diagnosed with the possibility of having PCOS. Not enough symptoms to fully diagnose, but I was definitely having difficulty ovulating after I stopped taking BC. So I was introduced to a great book by my doctor called Taking Charge of Your Fertility and decided that I would start charting so I could see what was really happening with me as my husband and I have decided that we are TTC. I bought this thermometer and have been completly pleased with it's performance! I love that it has an alarm and that it stores my data so that I can go back and chart if I happen to not get the information entered every day. I'm only on my second cycle so it hasn't fully started predicting things for me, but I'm throughly pleased with what I'm seeing!

Pros:

Alarm
Stores Data
Graph

Cons:

Remembering all the different symbols

Wendy

Flat Rock, Michigan

4 Stars

I would recommend this item to a friend.

Great Product

December 10, 2013

I decided to try the ibasal thermometer after a few years of trying to get pregnant without any luck. I had tried different basal thermometers before and always had trouble with them. The ibasal Thermometer has been a great addition to our ttc adventure. With using this I was able to figure out that unlike some other okps did not fully work for me. I found that I usually ovulate about 2-3 days after my first positive opk. Without this thermometer I would have never figured this out. I have only been using this for 3 cycles but am so glad that to have it. I would recommend this for anyone ttc especially those new to using a basal thermometer and those that have trouble sleeping. It has been great having the alarm on the thermometer it's self and not having to set another device to wake me up. If you are looking for a great aide to help increase your knowledge of your cycles and your body I would highly suggest this product for that.

Pros:

Storage of temperatures.
Telling you where you are in your cycle.
The ability to record other information.

Cons:

Time it take to record temperature

Stephanie

Los Angeles

5 Stars

I would recommend this item to a friend.

Best basal thermometer available.

August 15, 2013

This is the best basal thermometer out there. It is worth every cent.

Pros:

I would recommend this item to a friend.

Perfect for Poor Sleep Habits

June 16, 2013

This has been a god send in finally being able to track my BBT! I have very disrupted sleep,usually in blocks of 3-4 hours a night. Trying to use a normal thermometer was near on impossible. But with the iBasal I have finally seen a ovulation dip and temp surge!
The internal memory is a godsend and the alarm is super handy. Yes it is a little slow to take the recording [the first is in 3 min the second verifying beep is about 5] usually I have fallen back asleep by that time with the iBasal still in my mouth =P I just turn on my side and rest it in my hand on the pillow and I have had no troubles with it at all.
I don't use the software, but Fertility Friend has been amazing with tracking!
Def recommend this to any woman with poor sleep habits =)

Pros:

internal storage
ease of use once setup
alarm is great

Cons:

a little difficult to setup at first

Celeste P.

Tampa

5 Stars

I would recommend this item to a friend.

Perfect for NFP!

April 25, 2013

I use this device for natural birth control, not as a fertility monitor to help me get pregnant, though I will likely use it that way eventually. I bought it after researching the lady comp and baby comp monitors (which sell for about $500!) and as far as I can tell they do the exact same thing. It has been spot on accurate for me so far and I now feel very comfortable going with the monitor&#8217;s recommendations.
Things I love about the ibasal: The alarm feature, the fact that it does everything right on the monitor itself and I don&#8217;t need to go to a website, its easy to use, I don&#8217;t have to take hormones every day (yay!!)
Things I don&#8217;t love: It really, really should have a light on it so that you can read the temperatures in the dark. Duh!! It&#8217;s heavier than a regular thermometer, so my mouth gets tired. Screen could be larger so its easier to read.
All in all, it has been a great value for us.

Pros:

see review

Cons:

see review

Best Uses:

natural family planning
trying to get pregnant

WNL

Texas

4 Stars

Unsure about accuracy

April 18, 2013

I like some of the functions of this thermometer but Im not sure its all that accurate. I have been temping on two thermometers and recording results on two different sites. This month the ibasal says I ovulated on CD13 and my other thermometer says CD14. I think I Oed on CD14 because of the ovulation pains I felt all day. The ibasal also always gives a higher temp than the other thermometer. Last month they both gave temps that coincided with the same ovulation day. Now Im confused but I think my other thermometer gives a more accurate reading.

Pros:

I like the neat functions.

Cons:

Takes two months for it to learn your cycle.

Bee

Richmond

5 Stars

I would recommend this item to a friend.

Basal peace of mind

February 27, 2013

Like this thermometer because it does the calculating for me. I just stick it in my mouth when it tells me, take it out when it tells me. Then we baby dance when it tells me. Now if it can just tell me when my baby will arrive! I love the thing, but my husband would like to throw it out our window because of the alarm. Hey, a girl's gotta do what a girl's gotta do!